<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
	</head>
	<body>
		<script>
			//ES5方式
			function join(){
			var str = "";
			for(var i = 0; i < arguments.length; i++){
				if(i==0){
					str = arguments[i];
					}else{
						str += "|" + arguments[i];
					}
				}
				return str;
			}
			console.log(join("hello", "world"));
			//ES6方式
			function join2(...strs){
				var str = "";
				for(var i= 0; i < strs.length; i++){
					if(i == 0){
						str = strs[i];
					}else{
						str += "|" + strs[i];
					}
				}
				return str;

		</script>
	</body>
</html>
